Potassium

Potassium is a mineral that functions in every cell, tissue and organ in your body. Potassium is also an electrolyte that conducts electricity within each cell. It plays a role in contracting skeletal and smooth muscles, including your heart. Most foods contain potassium, especially fruits and vegetables. Potassium balance is essential for maintaining proper blood pressure and kidney function. Consuming too much sodium can increase your need for more potassium. Diarrhea and certain medications may also cause an increased need for potassium.